In need of a shutter release arm for Crown Graphic with Graflex f4.7 135mm shutter. I have investigated the usual sites E-bay, the big on-line stores, etc. I purchased an arm on-line, but the bracket is too short to engage the shutter release. One person suggested I use clear epoxy and fashion an extension long enough to engage the shutter button. That would be my option of last resort. Any suggestions?

There at least two (and probably more) different length shutter release arms made by Graflex for their cameras. You may have bought one for the 2 x 3 camera rather than the 4x5 that I assume that you have.
There was a post on this a while back that stated the lengths but I haven't been able to find it. Perhaps the author of the original post will see this and post a reply.
Best of luck finding the right one for your camera/shutter combination.

I do not have a clue how long they are. You need the 31102-P3 for your #2 Graphex shutter.

I thought the lengths were discussed years back but I do not know in what post. Nothing comes up using "manual trip arm" as the keyword, 20 come up using shutter paddle when all the terms dot is checked._________________The best camera ever made is the one that YOU enjoy using and produces the image quality that satifies YOU.

Failing at most other places...a source for alot of new in-the-box parts might be Fred Lustig in Reno,NV. His contact information is elsewhere on this website contained in a very informative article/interview. He often tells folks to send him their cameras for more elaborate repairs/refurbishing, so I don't know whether he would be willing to just send you out small parts...best way to find out would be to call him and ask. He's very knowledgeable and quite a nice fellow to chat with. Just be aware that he has no internet presence/email so a phone call would work best...and also keep in mind the time difference between you and Reno,NV as well. Hope you find the part you are looking for!!